Articles & Issues

Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 2, 2010
Accepted December 1, 2010

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

Operation characteristics of 1 ton/day-scale coal gasifier with additional stage

Yongseung Yun^† Seung Jong Lee Jin-Pyo Hong¹

Plant Engineering Center, Institute for Advanced Engineering, Yongin, Gyunggi 449-863, Korea ¹Power Generation Laboratory, Korea Electric Power Research Institute, Daejeon 305-380, Korea

Korean Journal of Chemical Engineering, May 2011, 28(5), 1188-1195(8), 10.1007/s11814-010-0499-6

Download PDF

Abstract

A one-stage coal gasifier was modified to accommodate the two stages of coal feeding. Operating characteristics were compared between the one-stage and two-stage gasification in terms of syngas composition, carbon conversion, shape and inner structure of produced slags, characteristics of particle size distribution in entrained fines, and effects on particulate removal facilities. Temperature at the second stage of the gasifier resulted in lower values, which_x000D_ confirms the performance of the second stage as a reduction area by endothermic reactions. The results suggest that the 10-20% increase in coal feeding to the second stage might not cause much loss in carbon conversion. Produced slag and the performance of metal filters and water scrubber were similar with the earlier results from one-stage gasification tests. The two-stage gasification appears to help in increasing the cold gas efficiency for the certain operating range. Two-stage gasification had an impact on the 0.1-1 μm size of entrained fines, which appear to be cenospheres that occur during the rapid quenching in temperature.

Keywords

Coal Gasification Two-stage Cold Gas Efficiency Cenosphere

References

International Energy Agency, World Energy Outlook (2006)
International Energy Agency, World Energy Outlook (2004)
Yun Y, Yoo YD, Korean J. Chem. Eng., 18(5), 679 (2001)
Yun Y, Lee GB, Chung SW, J. Korean Ind. Eng. Chem., 14(4), 511 (2003)
Yun Y, Yoo YD, J. Ind. Eng. Chem., 11(2), 228 (2005)
Watanabe M, Otaka M, Fuel., 1935 (2006)
Chen C, Horio M, Kojima T, Fuel., 1513 (2001)